Block forming mechanism



A. G. HOCH July 2, 1935.

BLOCK FORMING MECHANI SM 3 Sheets-Sheet 1 Filed May 28, 1932 gvvve'nto'aA MMS lfizwhao July 2 11935.

A. G. HOCH BLOCK FORMING MECHANISM Filed May 28, 1932 l mz ga 56' Auyusi 3 Sheets-Sheet 2 gwuento o July 2, 1935; A. G. HOCH 2,006,594

BLOCK FORMING MECHANI SM Filed May 28, 1932 3 Sheets-Sheet 5 ""Q W L.l"i 7. 0 45 n 45 226K V llllllllllllllllll Z1 29 gwvwntow Angus?@Cflach.

Patented July 2, 1935 UNITED S A-res PATENT OFFICE i 2.006.594 I 13Claim.

' chine whereby a series of hollow blocks may be formed of a plasticcomposition in one operation,

and whereby a number of series of the molded blocks may be readilystacked in tiers with adjacent blocks spaced apart in horizontal andvertical rows, and whereby the blocks may be thus stacked for settingand hardening of the composition of which they are formed so as toenable rapid production of the blocks by a single machine. Anotherobject is to provide a composition block molding machine in which thecomposition may be rapidly formed into blocks while in a wet unstablecondition, and whereby the blocks may be made of concrete embodying acoarser aggregate than is ordinarily used in the manufacture of concreteblocks.

Another object is to provide a composition block molding machineincluding a means for rapidly and thoroughly effecting compacting of thecomposition in the mold so as to permit substantially immediate removalof the block from the mold and thereby enable rapid reuse thereof.

Another object is to provide a hollow block molding machine in which theblocks are so molded and stacked for drying as to insure againstdistortion of the block, and whereby the finished blocks will beaccurate in their dimensions and their exterior surfaces maintained inproper angular relation to each other.

Another object is to provide a hollow block molding machine in which atrowling action will be effected on the interior surfaces of the blockas well as on the exterior side and end faces thereof so as to rendersuch surfaces highly resistant to the absorption of moisture.

Another object is to provide a. hollow block molding machine embodying aseries of cores and a mold associated therewith in which the mold may bereadily separated from the cores with the molded blocks retained thereinand thereafter (01. zs-m' Fig. 1 is a view of the molding machine asseen in side elevation;

Fig. '2 is a detail plan view taken on the line 22 of Fig. 1, with partsremoved;

Fig. 3 is a view in vertical section as seen on the line 3-4 of Fig. l,with parts shown in elevation and withparts removed; a

Fig. 4 'is a view in cross sectiontaken on th line l4 of Fig. 3, withparts shown in elevation;

Fig. 5 is a detail in vertical-section taken on the line 5-5 of Fig. 4,and depicting in broken lines relative movement of the parts;

Fig. 6 is a view in end elevation illustrating the manner of supportingand conveying the mold box apart from the core structure;

Fig. '7 is a view in end elevation of the core structure showing themold box as removed therefrom;

Fig. 8 is a detail in horizontal section and plan taken on the line 8-4!of Fig. 6, illustrating the means for efiecting detachable connectionbetween the mold box and pallet;

Fig. 9 is a detail in section viewed on the line 9-9 of Fig. 8;

Fig. 10 is a detail in vertical section viewed on the line Ill-l0 ofFig. 1;

Fig- 11 is a detail in horizontal section viewed on the line i I-H ofFig. l, with parts broken away;

Fig. 12 is a view in section and elevation of the mold shaker, as viewedapart from the mold box and core structure;

Fig. 13 is a view in section andelevation taken on the line l3|3 of Fig.1, showing the mold box conveyor;

Fig. 14 is a detail in elevation, as viewed on the line 12 of Fi 13.

Referring to the drawings more specifically, A indicates generally themold structure which comprises a base B, a core structure C normallysupported on the base B, a shaker D interposed between the core and thebase B, a pallet structure E detachably supported on the base structureB independent of the core structure C, a portable mold box F adapted tobe detachably connected to the pallet E, and a frame G serving as ahopper in association with the mold box.

The mold structure A is arranged adjacent one end of a platform H onwhich is mounted a movable chute I for receiving the materials to bedelivered to the mold structure and for directing same thereto.

An overhead track J is provided leading from adjacent the forward end ofthe platform H and extending over the mold structure to a suitable pointremote therefrom, and mounted on the track J is a carriage K adapted tobe employed for effecting removal of the mold box and its associatedpallet from the remainder of the mold structure, and to convey the moldbox and its associated palette to a point where the pallet with themolded blocks thereon may be detached from the mold box and the latterthen returned for reassemblage in the mold structure together withanother pallet; the carriage K also serving as a means for enablingstacking of a series of the pallets in tiers, as indicated at L in Fig.1.

The base B is here shown as embodying a pair of spaced horizontallyextending I-beams l4 on which are supported a series of transverselyextending blocks l5 and "5 arranged with the upper faces of the blocksl5 extending on a corresponding plane and with the upper faces of theblocks 16 extending on a plane spaced above the plane of the upper facesof the blocks l5, which latter serve as a support for the core structureC while the blocks l6 serve as an independent support for the pallet Eand the mold box F independent of and apart from the core structure.

The core structure embodies a series of parallel T-beams l1 connectedtogether by a series of tie rods Hi to form a unitary structure, andupon each of which of said beams is mounted a series of upwardly taperedcores l3 preferably of rectangular cross section and the upper ends ofwhich are flat and extend on a common plane. The beams I! normally seaton the upper faces of the blocks l5; the upper margins of the blocks I6being recessed, as indicated at 20, to provide clearance for the loweredges of the beams I1.

Seating on the upper faces of the blocks [6 is a rectangular frame Mwhich includes side rails 2| and end rails 22 and a series oflongitudinally extending spaced rails 23. The frame M surrounds the baseportion of the core structure with the intermediate rails 23 extendingbetween adjacent rails ll of the core structure; the lower margins ofthe rails 23 being cut away, as indicated at 24, to clear the tie rodsIll.

The pallet E embodies a plate 25 adapted to extend over and seat uponthe upper margin of the frame M, and which plate is formed with a seriesof openings 26 to receive and through which the upper portions of thecores l9 project when the plate 25 is supported on the frame M.

The openings 26 are shaped to conform to the outside of the cores l9 butare formed so that their margins are slightly spaced from the walls ofthe cores so as to afford a clearance which will permit of relativemovement of the cores and the pallet timing the molding operation, aswill hereinafter be described.

The pallet plate 25 is reenforced by a series of longitudinallyextending angle irons 2'! affixed to the under sides thereof, theoutermost of which are arranged to project alongside the imier upper Imargins of the side rails 2| of the frame M to facilitate positioning ofthe pallet and the frame in proper relation to each other on assemblagethereof. The upper edges of the end rails 22 of the frame M are notchedat 21' to receive the depending webs of the angle irons 21.

A pair of spaced angle irons 28 are mounted on the upper face of eachend of the pallet plate 25 and extend transversely thereof to reenforcethe pallet laterally.

The pallet is of such length that when assembled on the frame M its endportions will project beyond the end rails 22 of the latter, asparticularly shown in Fig. 3, and mounted on each end of the pallet is apair of downwardly projecting legs 29 which are adapted to afford asupport for the pallet when the latter is removed from the moldstructure, and which legs are of a length exceeding the height of themolded block so that one pallet may be supported on top of another withmolded blocks interposed therebetween.

The mold box F embodies a rectangular frame composd of side walls 30 andend walls 3| and which frame is divided longitudinally by a central parttion 32 and transversely by partitions 33 into a series of rectangularmold spaces 34 such that when the mold box is seated on the pallet E apair of the cores l9 will project upwardly into each space 34 with theirside faces spaced from the partitions 32 and 33 to form the spaces forreception of the materials to be molded.

The members of the mold box are of such height that when the mold box isseated on the pallet in the mold structure assembly, the upper margin ofthe mold box will extend on a plane with the upper ends of the cores I 9when the parts are in their normal position, as shown in Fig. 4.

The mold box is reenforced around its upper margin by angle irons 35projecting outwardly therefrom, and are further reenforced by similarangle irons 36 extending around the outside of the mold box adjacent thelower margin thereof.

Means are provided for effecting substantial connection between the moldbox and the pallet which embodies a rock shaft 37 mounted to extendlengthwise of the mold box along the outer face of one side member 30thereof, which rock shaft is equipped at each end thereof with anoperating lever 40 whereby the rock shaft may be manipulated to effectengagement and disengagement of catches 4| carried at each end of themold box and adapted to be engaged with and disengaged from the pallet.

A pair of catches 4| is provided on each end of the mold box whichcatches comprise horizontally opening hooks, as particularly shown inFig. 9, which are adapted to be slid in and out of engagement with apair of the angle irons 21 adjacent the ends of the pallet. Each pair ofthe catches 4| is rigidly mounted on and depends from a slide plate 42carried on the end angle iron 36 on the mold box and slidably held inplace thereon by pins 43 carried on the angle iron and protrudingthrough longitudinally extending slots 44 formed in the plate 42. Link45 leads from the slide plate 42 and connects with the lever 40 wherebyon rocking the latter the slide plate may be moved longitudinally of theangle iron 36 to advance the catches 4| in and out of engagement withthe angle irons 21 on the pallet.

The hopper frame G substantially conforms to the upper margin of themold box F and is designed to seat thereon during charging of the moldbox; the frame G being pivoted at 46 on standards 41 so that it may beswung from a vertical position, as indicated in dotted lines a in Fig.1, downwardly to the horizontal position over the mold box.

The chute I is mounted on rollers 46 supported on rails 49 whereby thechute may be advanced or retracted relative to the mold structure and sothat the forward end of the chute may be positioned to project over the'mold structure, as indicated by the dotted lines b in Fig. 1, and

whereby the chute may be retracted to a position clear of the moldstructure, as shown in full lines in Fig. 1.

The shaker D, particularly shown in Fig. 12, embodies two pair ofcrossed levers 56 and 5| extending along the ends of the blocks l5 andI6 in a general horizontal direction above the beams H but to one sidethereof; the levers 56 and 5| being inclined in opposite directions toeach other and being pivotally connected together by a tie rod 52intermediate the ends thereof.

The lower ends of the levers 50 connect with a roller 53 which extendsacross and is seated upon the beams |4 adjacent one end thereof, and thelower ends of the lever 5| are connected to a roller 54 extending acrossand seating upon the other end portions of the beams l4. The upper endsof the lever 50 are connected to a roller 55 which seatsupon the upperfaces of the lower end portions of the lever 5|, and the upper endportions of the lever 5| connect with a roller 56 which seats upon thelower end portions of the lever 50. 'Ihe'rollers 53 and 54 are thusadapted to travel on the beams |4 while the rollers 55 and 56 areadapted to travel upon the portions of the levers extendingtherebeneath.

Extending over and seating upon the roller 5| is an operating lever 51of general U-shaped form the ends of the legs of which are formed withaligned shoes 58 which bear against the under side of the roller 55 insuch manner that on downward depression of the outer end portion of thelever 51 the relative end portions of the levers 50 and 5| will bespread apart, as indicated in dotted lines in Fig. 12.

The rollers 55 and 56 are arranged so that their upper peripheralportions may be moved into slidable contact with the lower edges of thebeams ll of the core structure.

The carriage K embodies a pair of end frames 65 and 66 which extendbeneath the rails of the overhead track J, to depend therefrom, and arefitted with rollers 61 and 68 mounted to traverse the rails. A drum 69is revolubly carried by the frames 65 and 66 which drum extendshorizontally beneath the overhead track transversely thereof, and woundon each end portion of the drum 6 68 in corresponding directions is apair of cables I0 and II which pass over direction rollers 12 and I3revolubly mounted on shafts l4 and 15 supported on and connecting thecarriage end frames and 66.

The drum 69 is fitted with a gear wheel 11 which meshes with a pinion 18on a stub shaft I9 journaled in the carriage end member 65 and on whichstub shaft is mounted a hand wheel whereby the drum 69 may be manuallyrotated through the pinion l8 and gear Tl.

A releasable dog 8| is mounted on the carriage end frame 65 and arrangedto be engaged with the teeth of the pinion 18, as shown in Fig. 14, whenit is desired to hold the drum 69 against rotation.

The lower ends of the cables 10 and II are respectively connected to theend portions of a pair of horizontal bars 62 and 63, which carry ontheir under sides a pair of channel members 64 and 65 extending parallelwith each other. with their channels presented inwardly. 7 M

The channel members 84 and Y85 are spaced apart such distance that theymay be advanced longitudinally astride the outwardly projecting webs ofthe angle irons 35 on the ends of the mold box to effect engagementtherewith; as particularly shown in Fig. 13, and also shown in Fig. 1.The channel members 84 and 85 with their connecting bars 82 and 83constitute'a suspended carrier which when engaged with the mold box willmaintain the latter horizontal" during conveying thereof and by reasonofbeing supported at the four corners by the cables 10 and II willinsure against rocking of the mold box and consequent distortion of themolded blocks while the latter are being conveyed and assembled in thestacks.

Means are provided for limiting movement of the carriage K outwardly onthe rails of the track.

J so as to stop the carriage at a point directly above a stack L,together with means for guiding vertical movement of the carriers andthe mold box carried thereon when assembling the pallet in a stack.

This means is here shown as embodying vertical guide rods 86 extendingbetween the rails of the track J and a platform 81 therebeneath andclamps 88 for connecting the upper ends of the guide rods to the railswhich clamps serve as stops against which the forward rollers on thecarriage may abut; the guide rods 86 being adapted to be disposed invarious positions along the length of the rails in such relation to themold box carrier that when the carriage K is brought to rest against theclamps 88 notched projections 69 on the carrier will abut against theguide rods. The lower ends of the guide rods are engaged in sockets 90.

In the operation of the invention, a pallet E is positioned on the frameM with the upper portions of the cores l9 protruding through theopenings 26, as shown in Figs. 3 and 5; the pallet then being supportedthrough the medium of the frame M on the blocks l6 independent of thecore structure. The mold box F is then positioned on the pallet E andengaged therewith by means of the catches 4| by manipulation of eitherof the hand levers 40. The hopper frame F is then lowered into itsseated position on the margin of the mold box, whereupon the chute Icontaining a quantity of composition, such as concrete, is then advancedto a position so that its forward end will project over the mold box, asindicated by the dotted lines bin Fig, 1. The operator then scrapes aquantity of the composition from the chute into the mold box sufiicientto slightly more than fill the mold box, and distributes the compositionso as to fill the spaces 34 surrounding the cores I9. The compositionpreferably employed consists of a mixture of sand and hydraulic eementand an aggregate, such as crushed rockor The lever 51 in being supportedon the roller 54 is thus provided with a sliding fulcrum to compensatefor variation in the length of the end portion of the lever extendingbetween its fulcrum point on the roller 54 and its engagement with theroller 55 due to the relative movement of the upper and lower ends ofthe levers 50 and 5|, respectively.

Upward movement of the outer ends of the levers 50 and 5| operates toinitially elevate the core structure a short distance relative to themold consisting of the pallet and mold box, until the rollers 55 and 56are brought into contact with the lower edge of the side members of theframe M, whereupon this frame together with the pallet and the mold boxare elevated in unison with the core structure. The cores I9 will thenhave their upper end portions protruding above the plane of the moldbox, as indicated by the broken lines o in Fig. 5. On thus elevating thecore and mold a short distance the lever 51 is released thereby allowingthe mold and core to suddenly fall back to their normal position whichcauses the mold to impact on the blocks 16 thereby arresting downwardmovement of the mold and jarring the contents of the mold box. Thisaction is immediately followed by a slight continued downward movementof the core structure until the latter impacts and comes to rest on theblocks [5. This operation of the shaker is re peated a sufficient numberof times to cause compacting of the composition in the molding spaces34.

A wet mix of the composition is enabled by reason of excess watertherein being caused to rise to the top of the mold box because of itsdisplacement by the heavier constituent of the composition beingcompacted by the action of the vertical jars imparted to the molds.

It will be observed that during this operation the cores will be movedvertically up and down relative to the mold, thereby effecting atroweling action on the surfaces of the composition contacted thereby.

On thus effecting compacting of the composition, the hopper frame G isswung upwardly on its pivots 46 clear of the mold, the chute I beingmoved backwardly in the meantime to receive another charge of thecomposition.

The operator then levels oil the composition in the mold box by means ofa float to a level with the margin of the mold box and with the upperends of the cores; the mold box and the shaker then being stationary.

The carriage K is then moved to a position adjacent the mold structureand the drum 6!! is operated to lower the channel members 84 and 85 to aposition opposite the end angle irons 35 on the mold box, whereupon thecarriage K is again shifted to cause the channel members 84 and 85 toslide over the end angle irons, as before stated. When this is done thedrum 69 is operated to wind the cables 10 and Ii thereon so as to liftthe mold box with the attached pallet clear of the core structure, and,on the mold box and pallet being elevated to a desired level, the dog 8|is engaged with the pinion 18 to hold the drum 69 against rotation thussuspending the mold box and pallet, together with the molded blockscarried thereon, from the carriage K. g

The molded blocks are thus lifted upwardly with the pallet clear of thecores, which latter remain in their normal position on the base B,

whereupon another pallet may be positioned on the supporting frame M.

The carriage K is then advanced on the track J with the mold box andpallet suspended therebeneath to a desired position within the length ofthe track J, which movement is determined by the clamps 88, whereuponthe dog M is released from the pinion 18 on turning of the hand wheelsufliciently to permit freeing of the dog. The drum 69 is then operatedto lower the mold box and pallet onto a suitable support, which may be apreviously deposited pallet.

In lowering the mold box and pallet, the operator holds same with thenotches of the projections 89 engaging and bearing against the verticalguide rods 86, as shown in Fig. 11, thus preventing swinging of the moldbox on the cable suspension and also insuring the mold box and pelletcoming to rest in vertical alignment with a pallet therebeneath thusenabling the assemblage of a number of the pallets in a stack invertical alignment with each other so as to distribute the strains ofthe load equally and thereby obviate distortion of the assembled orstacked pallets.

The mold box is then detached from the pallet by manipulation of thelever 40 and its associated parts, whereupon the drum 6!! is operated tolift the mold box clear of the pallet and of the molded blocks supportedon the latter; the mold box being lifted vertically from the pallet andthe molded blocks so that the inner faces of the mold box constitutingthe walls of the mold spaces 34 will impart a troweling action to theside faces of the molded blocks, which are then left supported on thepallet and allowed-to stand thereon until dry.

The carriage K is then moved'back to a position over the mold structure,and the mold box lowered to a position on a pallet previously positionedon the supporting frame M, whereupon the mold box is attached to thepallet and the carriage K shifted to withdraw the channel members 84 andout of engagement with the mold box; the carriage being moved to a pointsufliciently remote from the mold structure to permit reoperation of thelatter, whereupon the operations before described are repeated. It willnow be seen that a series of the molded blocks may be formed in oneoperation, and this series readily conveyed to a suitable point, and anumber of such series of blocks stacked in a tier, as indicated at L inFig. 1, with each series of blocks supported on a pallet which in turnis supported on a pallet therebeneath.

A number of such stacks may thus be arranged within the length of theoverhead track J, which may be extended any desired distance from themold structure. a

If desired, a pair of the mold boxes may be employed so that while onemold box with its attached pallet carrying a charge of molded blocks isbeing conveyed to the stacking point and the ccnveyed mold box beingreturned, another mold box may be assembled in the mold structure andanother molding operation being effected, as shown in Fig. 1. In thisevent, the mold box conveyed on the carriage is removed therefrom so asto receive the channel members 84 and 85 for engagement with the moldbox then assembled in the mold structure.

It has been found in practice that by the use of this invention themolding composition may be used quite wet so that it will readily flowinto the form and also permit of the use of a coarser aggregate than isordinarily used in the manufacture of molded blocks, thus effecting aneconomy in the cost of the materials used, which with the facility ofoperation effecting an economy in labor, enables production of thefinished blocks at a very low cost.

I claim:

1. In a block molding machine, a fixed base, a core structure supportedon said base and adapted to be reciprocated vertically relative thereto,a mold structure supported on said base independent of said core andadapted to be raised and lowered with said core structure, and means forraising said core structure adapted to permit said core structure togravitate downwardly and impact on said base.

2. In a block' molding machine, a fixed base structure, a core structuremounted on said base structure for vertical movement relative thereto, amold supported on said base structure independent of said corestructure, means for reciprocating said core structure together withsaid mold vertically adapted to cause said core structure to impact atthe termination of its downward movement on said base structure, andmeans whereby said core structure will be caused to have a length oftravel exceeding that of the mold.

3. In a machine for molding composition blocks, a fixed base structure,a core structure supported on said base structure for verticalreciprocal movement relative thereto, a mold supported on said basestructure for vertical reciprocal movement relative thereto independentof said core structure, and means for reciprocating said core structureadapted to initially elevate the core structure relative to the mold andthereafter elevate said core structure and mold collectively and wherebysaid mold will be caused to come to rest at the terminus of itsdownstroke in advance of the core structure.

4. In a composition block molding machine, a fixed support, a coreseating on said support, a

' mold structure seating on said support independent of said core, meansassociated with said support for effecting vertical reciprocal movementof said core structure and mold relative to said support, and means forafiording relative movement of said core structure and mold on verticalreciprocation thereof relatively to the support.

5. In a machine for molding composition blocks, a fixed base member, acore structure supported on said base member, means for effectingvertical reciprocation of said core structure relative to said basemember, a mold supported on said base member, and means for effectingvertical reciprocation of said mold by said core structure reciprocatingmeans collectively withsaid core structure adapted to permit movement ofthe core structure independent of the mold preceding and subsequent tomovement of the latter.

6. In a composition block molding machine, a base, a series of bumpersembodies in said base, a core structure seating on said bumpers, asecond series of bumpers, a mold seating on said second series ofbumpers on a plane abovethe plane of the first named bumpers, and meansfor elevating said core structure and mold operable on release thereofto permit said structures to fall and impact on their respectivebumpers.

7. In a composition block molding machine, a fixed support, a corestructure carried on said support including a series of upwardlyextending cores, a pallet having openings therein to receive said cores,means for supporting said pallet on said support independent of saidcore structure, a mold box formed with a series of mold cham-v bers,means for detachably connecting said mold box to said pallet with saidcores projecting upwardly into said chambers, said mold box being openat its top' to receive materials to be molded, and means for elevatingsaid mold box and pallet clear of said core structure.

8. In a. composition block molding machine, a fixed support, a corestructure carried on said support including a series of upwardlyextending cores, a pallet having openings therein to receive said cores,means for supporting said pallet on said support independent of saidcore structure, a mold box formed with a series of mold chambers, meansfor detachably connecting said mold box to said pallet with said coresprojecting upwardly into said chambers, said mold box being open at itstop to receive materials to be molded, means for elevating said mold boxand pallet clear of said core structure, and means for conveying theelevated mold box in a suspended position to a point remote from saidcore structure.

9. In a concrete molding machine, a fixed base structure, a corestructure supported on said base structure embodying a series ofupwardly extending cores, a pallet formed with openings to receive saidcores, means for supporting said pallet independent of said cores, amold box, means for detachably connecting said mold box to said pallet,and means for reciprocating said cores relative to said base structureand to said pallet.

10. In a concrete molding machine, a fixed base structure, a corestructure supported on said base structure embodying a series ofupwardly extending cores, a pallet formed with openings to receive saidcores, means for supporting said pallet independent of said cores, a.mold box, means for detachably connecting said mold box to said pallet,means for reciprocating said cores relative to said pallet, and meanscooperating with said last named means for jarring said mold box andpallet.

11. In a composition block molding machine, a core structure including aseries of upwardly extending cores, a fixed base structure on which saidcore structure is carried, a portable pallet having openings to receivesaid cores, means for carrying said pallet on said base structureindependent of said core structure, and a mold box detachablyconnectable to said pallet and adapted to be positioned thereon andremoved therefrom perpendicular thereto.

12.,In a machine for molding composition blocks, a core structureincluding a series of upwardly extending cores, a fixed base supportingsaid core' structure, a mold box movable vertically relative to saidcore structure, a pallet interposed between said mold box and corestructure having openings therein through which said cores extend intosaid mold box, means for detachably connecting said mold box and pallettogether, means for supporting said connected mold box and pallet onsaid base, end flanges protruding from said mold box, channel membersadapted to longitudinally receive said flanges, and means for elevatingsaid channel members to withdraw said mold box and pallet verticallyfrom said core structure.

13. In a machine ifOl molding composition blocks, a core structureincluding a series of upwardly extending cores, a fixed base supportingsaid core structure, a mold box movable vertically relative to said corestructure, a pallet interposed between said mold box and core structurehaving openings therein through which said cores extend into said moldbox, means for detachably connecting said mold box and pallet together,means for supporting said connected mold box and pallet on said base,end flanges protruding from said mold box, channel members adapted tolongitudinally receive said flanges, means for elevating said channelmembers to withdraw said mold box and pallet vertically from said corestructure, and legs pro- Jecting downwardly from said pallet adapted toafford a support therefor when said pallet is removed from said corestructure.

AUGUST G. HOCH.

